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How Fast Is Distant Galaxy Recession?
2.00e+5 km/s
720 million km/h · 447 million mph
66.7% of the speed of light
Distant galaxies recede from us at speeds approaching 200,000 km/s due to cosmic expansion — the space between us is itself expanding. Most of the observable universe is, technically, moving away from us faster than light, an oddity allowed because space itself is what's growing.
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Did you know?
The 'edge' of the observable universe is currently 46 billion light-years away — far further than light could have travelled in any straightforward sense, because space itself has been expanding the whole time.
How it compares
- Space itself is what expands
- The galaxies are barely moving — space is stretching
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